Reactive Power Adjustment in MV Distribution Systems Integrating with Wind-Turbine Power Plants

Mongkol Treekijjanon, Boonruang Marungsri, Thanatchai Kulworawanichpong, Uthen Leeton

Abstract


This paper illustrates optimal reactive power setting for voltage stability in power distribution system affected from wind turbine operation. This paper shows the implementation of disturbance analysing device to compare before and after result of setting reactive compensator. In this research, to optimize the overall voltage limitation, three decision variables are participated. They are i) active/reactive power generated from wind turbine farm plants, ii) specified voltage magnitude all node limitation and iii) power factor control. Classical optimization technique is well-known and widely accepted for solving the problem. “WA-YU” wind turbine farm project has rated at 8.0 MW, 22-kV which is a wind turbine power plant of Provincial Electric Authority (PEA) of Thailand in Nakhon Ratchasima at feeder no. 10 was employed as a case study. The result showed that appropriate reactive power is efficiently related to the best power factor. The voltage limitation is controlled within ±5% range of nominal voltage (22 kV) as the PEA regulation. The controlled voltage provides benefits which are not affected other power users that is consuming power from the same feeder circuit.


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